JP2005076951A - Flow passage open/close device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flow passage open/close device provided at an air supply/exhaustion flow passage for ventilation and the like capable of securely preventing flow in a direction opposite to an exhaustion direction with a simple structure. <P>SOLUTION: The flow passage open/close device has a flow passage open/close wing 2 to be closed for an air flow in a direction from a flow entry 107 to a flow out-port 106, frame parts 1, 3 for rotatably holding the flow passage open/close wing, a rotation shaft 22, a first wing part 21 formed at a side for the rotation shaft and a second wing part 23 formed at a side opposite to the first wing part with the rotation shaft in between. At least one of the first wing part or the second wing part has a first engaging part 25. The frame part has a second engaging part 32 for restricting rotation of the flow passage open/close means in which the flow passage open/close means contacts with the first engaging part when the flow passage is closed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a flow path opening / closing device that is attached to a duct used for air supply / exhaust and has a flow path opening / closing function that regulates the flow direction of fluid in one direction.

  Conventionally, as this type of flow path opening and closing device, there is an invention described in Patent Document 1, for example. FIG. 5 is a schematic view of the structure of a flow path opening / closing device for explaining the invention.

  The channel opening / closing device A is installed in the middle of the channel of an air supply / exhaust path provided by laying a duct or at an air supply / exhaust port, and is attached to the duct 110. The channel opening / closing device A has two openings, an inlet 106 and an outlet 107, and opens the channel with respect to the flow of air from the inlet 106 to the outlet 107, and air in the opposite direction. It works to close the flow path against the flow of water.

  For this purpose, the flow path opening / closing device according to the above-described conventional invention has a flow path opening / closing blade 111 configured to match the flow path shape in a plate shape at the end of the cylindrical frame 101 on the outlet 107 side. It is attached so that the pivot shaft 103 is horizontally arranged. The channel opening / closing blade 111 is configured such that the center of gravity is located below the rotation shaft 103, and is configured to have a vertical posture when the channel is closed.

Further, on the outlet 107 side, the shielding plate 105 is disposed so as to face the blade surface below the rotation axis of the channel opening / closing blade 111 such that the area of the outlet is smaller than that of the channel opening / closing blade 111. Has been. By arranging this shielding plate 105, the pressure receiving area of the air flow on the lower blade surface of the rotating shaft 103 with respect to the flow of air from the inlet 106 side to the outlet 107 side is such that the upper blade surface of the rotating shaft 103. Since the rotation of the upper blade surface of the rotation shaft 103 toward the inlet 106 is restricted by the formation of the stopper 102, the flow path can be closed.
Japanese Patent Laid-Open No. 11-108431 (see FIG. 1, FIG. 2, paragraphs 0031 to 0037, etc.)

  However, in the above-described conventional channel opening / closing device, it is necessary to form the shielding part 105 on the outlet 107 side so as to face the channel opening / closing blade 103 in order to restrict the rotation of the channel opening / closing blade. In order to ensure as large an exhaust flow path as possible, it is preferable that the flow path opening / closing blade be as large as possible with respect to the cross-sectional area of the duct 110. However, in the above-described conventional configuration, the flow path is cut off on the outlet 107 side by the shielding plate. There was a problem that the area was reduced and ventilation resistance was generated, and ventilation performance could not be sufficiently obtained.

  An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a flow path opening / closing device that can reliably prevent backflow of ventilation with a simple configuration.

  In order to solve the above problems, a flow path opening / closing device according to the present invention includes a rotation shaft, a first wing portion formed on one side of the rotation shaft, the first wing portion and the rotation A flow path opening / closing means having a second wing portion formed on the opposite side across the shaft is rotatably mounted on the frame portion, and at least the first wing portion or the first wing portion in the flow path opening / closing means is configured. A first locking part is formed on at least one of the two wing parts, and the flow path opening / closing means abuts the first locking part when the flow path is closed to restrict the rotation of the flow path opening / closing means. The 2nd latching | locking part to be comprised is comprised.

  According to the present invention, it is possible to prevent an inflow of a reverse wind in the exhaust flow path with a simple configuration, to secure a flow path area as large as possible, and to realize a flow path opening / closing device with a low flow resistance.

  The flow path opening and closing device of the present invention is open for the air flow from the inflow port to the inflow port, while being open for the air flow from the inflow port to the outflow port. A flow path opening / closing means, a flow path opening / closing means that rotatably supports the frame portion that forms the inlet and the outlet, and the flow path opening / closing means has a rotation shaft and a rotation shaft. A first wing portion formed on one side and a second wing portion formed on the opposite side of the first wing portion with the rotation shaft interposed therebetween, and at least the first wing portion or the second wing portion A first locking part is formed on at least one of the parts, and the flow path opening / closing means contacts the first locking part when the flow path is closed on the frame part to restrict the rotation of the flow path opening / closing means. It has the 2nd latching | locking part, It is characterized by the above-mentioned. The shape of the channel opening / closing means may be approximately circular or approximately rectangular, but it is preferable that the channel opening / closing means is configured in a rectangular shape in consideration of the arrangement of a weight part to be described later and a larger channel cross-sectional area.

  Here, the flow path opening / closing means may be configured such that the area of the first wing part is larger than the area of the second wing part. A 1st wing | blade part can receive the distribution | circulation of air, and can make it easy to rotate.

  The center of gravity of the flow path opening / closing means is configured to be on the second wing portion side with respect to the rotation axis. As a result, the first wing receives pressure of the air flow and opens the flow path for the normal wind (air flow from the inlet to the outlet). It is possible to encourage the pressure to be received and to return to the position where the flow path is closed.

  Further, the second wing portion may be formed with a weight portion at the end opposite to the first wing portion and the rotation axis. Another part may be fitted, or the second wing portion may be configured to have a greater thickness than the first wing portion. In addition, this weight part is more effective when the surface side facing the outflow port side is heavier than the opposite surface when the flow path is closed with respect to the surface of the second wing portion. .

  Further, the weight portion may be configured to have a blade piece portion having a surface substantially perpendicular to the surface of the second wing portion. When the flow path opening / closing means is fully opened, it is preferable that the first wing portion is formed close to the surface formed by the rotation axis and the air flow direction. If the wing piece portion is configured as described above, the first wing portion which is the main wing portion is easily operated by being attracted by the operation of the wing piece portion, so that the opening / closing operation is performed more accurately.

  Further, the frame portion is in contact with at least one of the first wing portion or the second wing portion, and at the time of opening the flow path, at least the wing surface of the first wing portion is from a surface formed by the rotation shaft and the air flow direction. Also, an angle restricting portion may be provided so as to be restricted to the position side where the flow path is closed. If it does so, the malfunction that the 1st wing | blade part will rotate too much and it does not return to a closed position at the time of a headwind can be avoided reliably.

  Further, the frame portion is configured by a first frame portion having an outflow port and a second frame portion having an inflow port, and is configured by fitting the first frame portion and the second frame portion to each other. It is good to. If the flow channel opening / closing means as large as possible with respect to the flow path inner surface shape is provided, the frame portion is constituted by a divided body, and the flow channel opening / closing means is built in when the frame portion is fitted. Therefore, the flow path opening / closing means for clearance required for mounting the flow path opening / closing means can be configured to be larger. In addition, it is preferable that the shaft portion of the channel opening / closing means is sandwiched when the frame portion is fitted, because the space for providing the receiving portion of the rotating shaft can be reduced.

  In the middle of the exhaust flow path for guiding the air supplied and exhausted from the ventilation means of the air conditioner provided with the ventilation means for exhausting the air on the air-conditioned space side to the outdoor side. Alternatively, it may be provided at the end. In an air conditioner with a ventilation function, an indoor unit is equipped with a ventilation fan and exhausts to the outside through an exhaust duct. However, the direction of the outlet may not be constant due to the exhaust duct being pulled around. High nature. The flow path opening and closing device of the present invention opens the flow path against the normal wind and closes the flow path against the back wind even when the installation direction is fixed as well as when the installation direction is fixed. I have confirmed that.

  In addition, although described about the air conditioner here, even if it applies to ventilation apparatuses, such as an air cleaner which has a function which ventilates with respect to the outdoors, a bathroom or a kitchen, etc., it is effective.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, the configuration of the flow path opening / closing device according to the embodiment of the present invention will be described with reference to FIG. FIG. 1A shows an assembly state diagram of the flow path opening / closing device, and FIG. 1B shows an exploded view of the flow path opening / closing device. The flow path opening / closing device B according to the present embodiment includes a first frame portion 1, a second frame portion 3, and a flow path opening / closing blade 2.

  First, the first frame portion 1 has a flow path connecting portion 11 and a cylindrical portion 14 that fits with the second frame portion 3 on the inlet side so as to be attached to the duct 110. Reference numeral 12 denotes a display portion indicating the first wing portion side, which is formed as a mark so that the mounting direction is not mistaken.

  Further, the second frame portion 3 is fitted into the cylindrical upper portion 35 formed to be inserted and fitted with the cylindrical portion 14 of the first frame portion, and the fitting hole 13 of the first frame portion 1 so as to be mutually connected. A locking claw 33 for fixing, a rotation bearing portion 34 for receiving the rotation shaft 22 of the flow path opening / closing blade 2, and a net portion 31 for preventing intrusion of insects and the like are provided.

  The flow path opening / closing blade 2 is formed with a first wing portion 21 on one side and a second wing portion 23 on the other side with a rotation shaft 22 interposed therebetween. The first wing portion 21 is configured to have a larger pressure receiving area than the second wing portion 23. That is, the rotation shaft 22 is biased toward the second wing portion 23 side.

  Further, a weight portion 24 is integrally formed on the flow path opening / closing blade 2 so that the center of gravity of the flow path opening / closing blade 2 is closer to the second blade portion side with respect to the rotation shaft 22. Furthermore, the blade surface on the first blade portion side is configured to be thinner than the second blade portion. In the same figure, it is made thin so as to go around the center part of the wing surface. Further, a first locking portion 25 is provided at the end of the second wing portion so as to be positioned when the flow path is closed, and the second locking portion formed in a part of the second frame portion 3 is in contact with the second locking portion. It is configured to touch.

  FIG. 2 shows an enlarged configuration diagram of the channel opening / closing blade 2. The weight part 24 is a wing that is integrally formed with respect to the second wing part on the side opposite to the first wing part 21 with respect to the rotation shaft 22 in the second wing part 23 configured in a plane. It is formed in a single shape. At this time, as shown in FIG. 3, the outer peripheral side is R-shaped on the lower side of the blade surface of the second blade portion so that the weight portion does not contact the inner wall of the second frame portion 3 when the flow path opening / closing blade 2 rotates. It is comprised so that it may have.

  The opening / closing operation of the flow path opening / closing device B configured as described above will be described with reference to FIG. FIG. 3 is a schematic configuration diagram in the XX section of FIG. When the flow path opening / closing device B is arranged so that the outlet 107 side is vertically downward, as shown in FIG. Since the center of gravity of the blade 2 is on the second blade portion side with respect to the rotation shaft 22 and the position of the first locking portion 25 and the second locking portion 32 is in contact with each other, the flow is restricted. The road opening / closing blade 2 maintains the posture of the flow path closed state.

  On the other hand, when the wind is generated from the inlet 106 side to the outlet 107 side by operating the ventilation means, the first wing portion 21 receives pressure and pushes it downward to open the flow path. Even when the flow path opening / closing blade 2 is fully open (the state shown in FIG. 3B) on the side wall surface of the second frame portion 3, the first blade surface 21 is inclined toward the closed side with respect to the air flow direction. Is provided with an angle restricting portion 35. The angle restricting portion 35 is, for example, at a position where the first blade surface 21 is inclined toward the closing side with respect to the air flow direction with respect to the imaginary line Y facing the rotation shaft 22 in the air flow direction as shown in FIG. Protrusions are formed or the like so that the rotation is restricted.

  Note that if the channel opening / closing blade 2 is configured so that the center of gravity of the channel opening / closing blade 2 is extremely on the second blade portion side, the response of the channel opening / closing blade 2 to the breeze deteriorates. It may be determined appropriately according to the duct diameter, the material for opening and closing the flow path, etc. so as to operate against the wind speed.

  In the case where the flow path opening / closing device B is arranged so that the outlet 107 side is in a vertically upward position or close to it, the flow path is in the relationship of the center of gravity even when there is no forward air flow with respect to the flow path opening / closing device. Although the open / close blade 2 is in the open position, the angle restricting portion 35 restricts the first blade portion to a position where it can easily return to the reverse wind. The road is easily closed.

  It should be noted that when the flow path opening / closing device B is arranged so that the outlet 107 side is vertically upward or close to it, the opening / closing operation may not be successful in the case of extremely low wind speeds or reverse winds. If the road opening / closing device B is arranged so that the outlet 107 side is vertically downward, or the second wing part is vertically inclined with respect to the first wing part, the road opening / closing device B is inclined with respect to the vertical direction. Is preferred.

  Next, the operation at the time of headwind will be described with reference to FIG. For example, when the back air blows to the ventilation channel because the atmospheric pressure on the outside air side becomes higher than the indoor side, the back wind is applied to the first wing portion 21 as shown in FIG. Therefore, the channel opening / closing blade 2 tries to rotate in the direction of the arrow. However, the contact between the first locking portion 25 and the second locking portion 32 restricts the rotational operation beyond the flow path closed state, so that the posture of the flow path closed state as shown in FIG. Kept.

  In the above-described embodiment, the first locking portion 25 has a convex shape and the second locking portion 32 has a concave shape. However, the opposite configuration may be used. These locking portions may be provided on the first wing portion side, but it is preferable from the viewpoint of reliability to provide the locking portion on the second wing portion side which is thick and strong.

(A) Assembly state diagram of the flow path opening / closing device of the embodiment of the present invention (b) Exploded view of the flow path opening / closing device of the embodiment of the present invention Enlarged configuration diagram of the channel opening and closing blade of the embodiment of the present invention (A) Schematic cross-sectional view showing the state of the channel opening and closing blades in a windless state in the embodiment of the present invention (a) Schematic cross-sectional diagram showing the operation of the channel opening and closing blades in normal wind in the embodiment of the present invention Cross-sectional schematic diagram showing the movement of the channel opening and closing blades during headwind in the embodiment of the present invention (A) Schematic cross-sectional configuration diagram of a conventional channel switching device (b) Schematic configuration diagram in the ZZ cross section of FIG. 5 (a)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st frame pair 2 Flow path opening / closing blade 3 2nd frame pair 21 1st blade part 22 Rotating shaft 23 2nd blade part 24 Weight part 25 1st latching | locking part 32 2nd latching | locking part 34 times Dynamic bearing part 35 Angle restriction part

Claims (10)

An inflow port, an outflow port, and a channel opening / closing means that is open to the air flow from the inflow port to the outflow port, and is closed to the air flow from the outflow port toward the inflow port. A flow path opening / closing device that rotatably holds the flow path opening / closing means and has a frame portion that constitutes the inlet and the outlet. A first wing portion formed on one side with respect to the shaft, and a second wing portion formed on the opposite side across the first wing portion and the rotation shaft, and at least the first wing portion At least one of the first and second wings, and the flow path opening and closing means is in contact with the first locking portion when the flow path is closed on the frame portion, A channel opening / closing apparatus comprising a second locking portion for restricting rotation of the channel opening / closing means. 2. The flow path opening / closing apparatus according to claim 1, wherein the flow path opening / closing means is configured such that an area of the first wing portion is larger than an area of the second wing portion. The flow path opening / closing apparatus according to claim 2, wherein the center of gravity of the flow path opening / closing means is configured to be on the second wing portion side with respect to the rotation axis. 4. The flow path opening / closing device according to claim 3, wherein a weight portion is formed on an end portion of the second wing portion opposite to the first wing portion with the rotation shaft interposed therebetween. 5. The flow path according to claim 4, wherein the weight portion is configured such that a surface side facing the outflow port side is heavier than an opposite surface when the flow path is closed with respect to the surface of the second wing portion. Switchgear. 6. The flow path opening and closing according to claim 4, wherein the weight portion includes a blade piece portion having a surface substantially perpendicular to a surface of the second wing portion. apparatus. The frame portion is in contact with at least one blade of the first wing portion or the second wing portion, and at least the wing surface of the first wing portion when the flow path is opened is a surface formed by the rotating shaft and the air flow direction. The channel opening / closing device according to claim 1, wherein an angle regulating portion is provided so as to be regulated to a position side where the channel is closed. A frame part is comprised by the 1st frame part which has an outflow port, and the 2nd frame part which has an inflow port, and is comprised when the said 1st frame part and the said 2nd frame part mutually fit. The flow path opening and closing device according to claim 1. The flow path opening / closing means is rotatably fitted in a bearing part included in at least one of the first frame part and the second frame part, and the first frame part and the second frame part are fitted and held. The flow path opening and closing device according to claim 8. A ventilating means for exhausting air on the air-conditioned space side to the outdoor side is provided, and either in the middle or at the end of an exhaust flow path for guiding air supplied or exhausted from the ventilating means to the outdoor side. An air conditioner comprising the flow path opening and closing device according to one item.

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